USE OF THERMO THICKENING POLYMERS IN THE GAS AND OIL INDUSTRY

摘要

The invention relates to a method of treating a formation or rocky cavity, comprising the step of injecting into said formation or rocky cavity, an aqueous solution of a water-soluble thermo-thickening polymer, said thermo-thickening polymer being able to form a gel at a threshold temperature (T), an internal temperature (T) of the formation or rock cavity being greater than or equal to said threshold temperature (T), said method being characterized in that the thermo-thickening polymer is a cellulosic chain, partially etherified with hydroxyalkyl or C -C alkyl groups, or a polyacrylamide-based copolymer comprising N-isopropylacrylamide (NIPAM) and / or N-vinylpyrrolidone groups. Such a process is advantageous for blocking water in the oil or gas fields, or for solving the problems of channeling water between the injection wells and the extraction wells.